Detection and characterization of longitudinal field for tip-enhanced Raman spectroscopy

Hayazawa, Norihiko; Saito, Yuika; Kawata, Satoshi

doi:10.1063/1.1839646

Cited by 246 publications

(128 citation statements)

References 21 publications

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“…Noticeably, the numerical demonstration of the attainment of a strong longitudinal field component under linearly polarized excitation by the introduction of an asymmetry in an originally axisymmetric probe opens up interesting perspectives: longitudinal fields are essential not only for fluorescence measurements (especially for the high resolution imaging of fluorescent molecules with a mainly longitudinal dipole moment), but also for other potential applications like near field second-harmonic generation and Raman spectroscopy [39,40]. Therefore, the possibility to generate them without resorting to a cumbersome radially polarized excitation would foster the development of new exciting horizons.…”

Section: Discussionmentioning

confidence: 99%

Interaction of an Asymmetric Scanning Near Field Optical Microscopy Probe With Fluorescent Molecules

Lotito

Sennhauser²,

Hafner³

et al. 2011

PIER

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Abstract-We present a numerical analysis of the interaction between novel scanning near field optical microscopy probes based on an asymmetric structure and a single fluorescent molecule. Our finite element analysis shows how such near field probes can be effectively used for high resolution detection of single molecules, in particular those with a longitudinal dipole moment. At the same time, fluorescent molecules can be exploited as point-like probes of the single vectorial components of the near field distribution at the probe apex, providing a powerful tool for near field probe characterization.

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Section: Discussionmentioning

confidence: 99%

Interaction of an Asymmetric Scanning Near Field Optical Microscopy Probe With Fluorescent Molecules

Lotito

Sennhauser²,

Hafner³

et al. 2011

PIER

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“…When a high NA objective lens tightly focuses a linearly polarized light, the resulting polarization at the focal plane consists of both p and s-components [51,52]. Besides this polarization admixture, the field intensity distributions of each component cause a problem when the spatial resolution is down to nanometer scale.…”

Section: Polarization Measurement Under a High Na Objective Lensmentioning

confidence: 99%

Imaging and spectroscopy through plasmonic nano-probe

Saito

Verma

2009

Eur. Phys. J. Appl. Phys.

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Abstract. This article is a comprehensive review of the subject of near-field nano imaging and spectroscopy by surface plasmon polaritons induced on a metallized probe. The emphasis of the review is on fundamental aspects of plasmon enhancement and near-field spectroscopy, which are categorized as optical antenna structures, polarization properties in near-field, resonance frequency of surface plasmons, etc. Most recent studies that contribute to the understanding and interpretation of these phenomena are highlighted. Applications of near-field optics as newly established analytical tools for biology, materials sciences and plasmonic superlenses are included in the article.

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“…In this configuration the tip comes from the top and the light is excited and collected from a high numerical aperture objective beneath the sample [1]. Focusing radial polarization through a high numerical aperture results in regions of the focus that are polarized in and out of the sample plane, which promotes interactions between the tip and sample [66,70]. High sensitivity TERS measurements have been performed using thin, optically transparent, metal plates [45,46].…”

Section: Experimental Ters Configurationsmentioning

confidence: 99%

Tip enhanced Raman scattering: plasmonic enhancements for nanoscale chemical analysis

2014

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Tip enhanced Raman scattering (TERS) is an emerging technique that uses a metalized scanning probe microscope tip to spatially localize electric fields that enhances Raman scattering enabling chemical imaging on nanometer dimensions. Arising from the same principles as surface enhanced Raman scattering (SERS), TERS offers unique advantages associated with controling the size, shape, and location of the enhancing nanostructure. In this article we discuss the correlations between current understanding of SERS and how this relates to TERS, as well as how TERS provides new understanding and insights. The relationship between plasmon resonances and Raman enhancements is emphasized as the key to obtaining optimal TERS results. Applications of TERS, including chemical analysis of carbon nanotubes, organic molecules, inorganic crystals, nucleic acids, proteins, cells and organisms, are used to illustrate the information that can be gained. Under ideal conditions TERS is capable of single molecule sensitivity and sub-nanometer spatial resolution. The ability to control plasmonic enhancements for chemical analysis suggests new experiments and opportunities to understand molecular composition and interactions on the nanoscale.

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Detection and characterization of longitudinal field for tip-enhanced Raman spectroscopy

Cited by 246 publications

References 21 publications

Interaction of an Asymmetric Scanning Near Field Optical Microscopy Probe With Fluorescent Molecules

Interaction of an Asymmetric Scanning Near Field Optical Microscopy Probe With Fluorescent Molecules

Imaging and spectroscopy through plasmonic nano-probe

Tip enhanced Raman scattering: plasmonic enhancements for nanoscale chemical analysis

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